DocBook is an XML vocabulary which enables you to create document content in a presentation-neutral form that captures the logical structure of the content. Using the DocBook Project XSL stylesheets, you can publish DocBook content as HTML pages and PDF files and other formats, including man pages, HTML Help, and JavaHelp.

Docvert is Web service software that takes
multiple word processor files (typically .doc) and
converts them to Oasis OpenDocument v1.0 format,
and then optionally to any XML/HTML format. The
results are returned in a .zip file.

XMLStarlet is a set of command line XML utilities
which can be used to transform, query, validate,
and edit XML documents and files using a simple
set of shell commands, similar to the way it is
done for plain text files using
grep/sed/awk/tr/diff/patch.

oXygen is an XML editor that supports any XML
document, and works with XML Schemas, DTDs, Relax
NG schemas, and NRL Schemas. It has powerful
transformation support that allows you to edit
XSLT and XSL-FO documents and to obtain documents
in the desired output format (such as HTML, PS, or
PDF) with just one click. It also includes a
complete Subversion client, support for flattening
XML Schemata, an XML Schema instance generator,
integration with the X-Hive/DB, MarkLogic and
TigerLogic XML databases, editing actions on the
diagram, and a rename refactoring action.

GroupServer is a Web-based mailing list manager designed for large sites. It provides email interaction like a traditional mailing list manager but also supports reading, searching, and posting of messages and files via the Web. Users have forum-style profiles, and can manage their email addresses and other settings using the same Web interface. It has supports features such as Atom feeds, a basic CMS, statistics, multiple verified addresses per user, and bounce detection, and is able to be heavily customized.

svn2cl is an XSLT script that generates a clasic
GNU-style changelog file from Subversion log
messages. It generates a friendly-looking
changelog from Subversion log messages like cvs2cl
does for CVS (although this is a lot simpler with
subversion).

Silva is a CMS for organizations that manage multiple or complex Web sites. Content is stored in clean XML, independent of layout and presentation. Features include versioning, a workflow system, an integral visual editor, content reuse, sophisticated access control, multi-site management, extensive import/export facilities, fine-grained templating, and hi-res image storage and manipulation. Silva is built on top of the Zope Web application platform.

Syntext Serna is a highly customizable, multi-platform, pure XSL-driven WYSIWYG XML content editor. It looks and works like a conventional word processor, yet it gives you much more flexibility to alter or reuse content while keeping its integrity intact. It lets you collaborate on compound documents that contain embedded data from various sources. Content is viewed as an integrated whole that is intuitively transparent to authors.

OpenBlueLab is an ERP designed through UML models using an MDA approach. Each business domain (such as Financial, Sales/CRM, HCM, PLM, or SCM) is separated into subdomains which are designed through models. Theses models are interconnected through common classes and workflows.
It is generated for Alfresco, but could be generated for other frameworks.